Preface
Classes were suspended for 10 days in the first year of junior high school. Can they continue this year? Stop for two weeks and it’s done!
It's a pity that the director of the third grade of junior high school did not approve it, so I can only come for one week...
The life is very leisurely, and the food is naturally much better than Jiya... (Jizhong yyds)
DAY0
I took a shortcut in the evening (a newly built road, Nanlang Express, no one around), and arrived at the computer room at 7:10. There were only two of us in the second grade of junior high school. On the first night, we tried the CUHK school competition, and we really failed in the first three questions ( Why is it in English, I...), and then the obscenity started.
DAY1
I got up at 7:20 in the morning. It’s not too late. I had a peach and went to do the quiz
competition...
I am *****************
. The difficulty of the competition is very good. I Just one part is worth 30...
Okay, next time the game will be violent.
I made claypot rice at noon, insisted on playing ball every day in the afternoon, made a coconut at night, and seemed to have a midnight snack (skewers) every day.
Summarize
T1 doubt
Exam: 30 points (an optimization trie has the same points as violence)
Correct answer: Tire divide and conquer/direct divide and conquer (my conscience suggests the first option, because I spent a day adjusting the second option...)
T2 vineyard (grape)
Weird connected block messing around with problems, not very good at doing unions...
T3 duel (fight)
I should give some points. Correct
answer: relatively disgusting, minimum differential or spanning tree + lca (corrected only the next day)
T4 ckw sum (sum)
I still don’t understand it at all
DAY2
There was no alarm clock in the morning, so I got up at 8:00, bought some bread and came to play the game (fog...) I was
still beaten violently, and the violence was not as full as usual (actually only T2 had 40 points).
I heard that there will be no game tomorrow, so I can finally change it. Question
Summarize
T1 dna
Exam: 0 points.
Question correction: 100 points
. I was violent during the exam. The correct answer was obviously greedy.
I finished correcting it on the same day.
T2 fruitlet
Violence + difference.
I scored 40 points on two subtasks.
T3 plus minus
I didn’t win the exam because of the violence.
Correct answer: After optimizing dp with matrix multiplication, use preprocessing + juzhen vector multiplication to optimize
AC. I can’t believe it.
T4 point
???
Correct solution: cow-horse triangulation + convex hull...
DAY3
There was no competition, so I changed DAY2 and T3 in one morning.
It seemed that I could only change 2 questions every day...
In the afternoon, I listened to the last few questions of the CUHK school competition and corrected them. The questions for the competition were not changed. I
went to the cultural class in the evening...
DAY4
The game exploded again
T1 Gu (gu)
T2 Little Green and Little Blue-Castle (castle)
T3 Gu Gu (gugu)
T4 Gu Gu Gu (gugu)